Technical Data Parameter Value / Description Manufacturer Part Number 1SFL647001R7011 Product Line ABB OVR Surge Protective Device Type / Class Type 2 Surge Arrester (Tested according to IEC/EN 61643-11) Rated Voltage (Un) 230/400V (for 50/60Hz AC systems) Maximum Continuous Operating Voltage (Uc) 320 V AC (between Line and Neutral). This is the voltage it can withstand continuously. Protection Level (Up) @ In ≤ 1.5 kV (measured at the rated discharge current In). This is the key parameter defining its clamping performance. Nominal Discharge Current (In) 8/20 µs 20 kA (per pole). Standard test current representing its duty cycle. Maximum Discharge Current (Imax) 8/20 µs 40 kA (per pole). The maximum single surge current it can handle once. Response Time < 25 ns Backup Fuse Recommendation Typically 63A gL/gG or as per local regulations. Must be verified in the installation manual. Number of Poles / Connection 1P (Single Pole, for protection of one phase line to neutral/earth). Multiple units are used for multi-phase systems. Technology Varistor-based (Metal Oxide Varistor - MOV). Status Indicator Visual window (Green = OK, Red = Fault/End-of-Life). Thermal Protection Integrated thermal disconnector. Mounting DIN-rail mounted (35 mm standard rail). Width 1 module (18 mm on a standard DIN rail). Standards & Certifications IEC/EN 61643-11, CE marked.